The MarCum RT-9 Tablet is great on its own, but the Performance Pack gives it an added boost of power and convenience that can really transform your next fishing outing. Not only is it a protective soft-pack shuttle, but the Performance Pack also includes a docking cradle and RAM mounting accessories, allowing for compact storage and efficient portability. The docking cradle can be attached to an external 12V, 9-amp battery to charge the internal lithium battery.